Collapsible rotary spear



SePf- 30, `1930. A. .c. BAIMBRIDGE Er AL coLLAPsIBLE ROTARY SPEAK Filed June 13, 192s A z :E WIJK H n l,

/ WhIue M4 77@w Arroz/'v5 Ys A53,5 drawings, in which Patented Sept. 30, 1930 ALeHAEUso. `BAIMBR.more.Aun ERWIN Beans, ,for Los miennes, AND .JESSE ,i-M. c. extremisten, or-sonmrresme, CALIFORNIA c i Y P 1 COLL/.Irrsinn norearslznsn nppylieatlin filed :Lune 13,

Thisinvention relatesto aspear Which is suitablePiior'fishing--outof -Well holes tubular members, sueh aspipe, casing and the like, and appertains moreparticularlyfto a Col.-

= .5 .lapsilolespean As,isWellfknow'n in the art et well drilling;r it? is advantageous at times Ato 11h-ange-tliehole o'fa spear'and in someinstances to Withdraw-the spear fromfthe hole. 'Heretoiiore, tripspears lhave been used to me meet'this desired-'feature of'operation. Such spears `are released -by drivingl upon them `With-tools. `V 'i Y j lie-present invention hasfor"itsyprimary jobjeot the provision of a collapsible spear 35i operable' byvk rotation oftheflishingtool string to place theslipsin;expanded or collapsed e A3U tion.

` These' objects: together -With other objects and corresponding aocomplishmentsare ob tained by means of the embodiment of our invention illustrated `in the' accompanying Fig. l is a longitudinal section through a fragment of a Well casing and tubing and our improved spear shown 1n elevation Within the tubing in-posltlon taking hold of the tub- .ufl ing; Fig. 2 is an elevation partly in section Y Von an enlarged scale showing the spear locked in Work non-engaging position; Fig. 8 is a view similar to Fig. 2 shovvingthe parts in Work engaging position; and Figs. l to are e5 sections as seen on the lines correspondingly numbered in FigsQ and 3.

Referring` more particularly to l, a

Well casing is indicated bylO. Disposed therein is tubing l1 which is to be elevated and uponv which the spear has'taken al hold.I

:head 13 includes -a tapered threaded adapting it for connection totlieiishingtool string, and at Vthe lower end-a threadedbore 518 is providedtoieceive therthreadedend of mandreld. A, Set serewll--serves to loekthe Amandrel in attached position.' I'lj-he'headjs Arecessed on diametrieally oppositeesides atiw Y surfaces of coupling? j avvsf y20h and '-QOH-irespecllfVithin thetubing istheffspear-Wliiohliszattachjed to aisbingtool string ljandWhere-` bythe' spearfis-manipulated.1

` The spear comprises ahead '1'3- to vvhieha mandrel 14A is-seeu'red. Mountedoverfthe o mandrel is rotatable and lloiigitlitlinali-y sliiftable cage 'or shell l Carrying-'slips 16. Referring more in detailltothedrawingf the pin 17 the periphery; to 1 provide coupling j aWs 20a and 20h. Themandrel lll-is provided with V-abutment jaws-2l projecting vfromvthe kcylindrical `portiom tliereoitlie lovver portionf-o'f the mandrel fleeing f enlarged `and provided with a `tapering surface {as indicatediby '22. At the endofthe 'gage is-a head 23.'

@The "shell or cage-515 is Y tubular -l Vin lform Tand has longitudinal slots-24 toaccolnmodate slips 16. ilhe'slips are provided with inclined inner fac-es to ;coact-/Withtl1e tapering per- `tionA oil the mandrel. =Wings or extensionsQ are provided on the slips to engage'theinner Wall or 4the Cage andA -prevent displacement mountedv ing-position `solgthatthey -can '-be projected and retraoted. V Extending inward- '1y from. the Wall offtlie'cage attlieguppererd are abutment -wj-ai'vs '26 to Llco-eperfate vwith 'jav`v s-2l`.` 'it/louisted.y upom the cage are bowed 135 v springsef preferably attached-at one end. to

the oagean'dfi'reeat tlieother. 'Tliesersprings serve to yieldi-ngly engageftheftubingnd 'rictionally resist` retatien of` theoage. y Y

Athe positionshown i-ni-jFigiQl. @The manfd-I'elis their turned in relatlon to theoage so that-cou'- plingfjaivs 28@ andfbj thereon engage lateral 105 tively with:theffabutment jaws l2l\and" 26- in 2aline1nentg theiend taeesbearing upononean other. In-,tliisposition' the; tperingjsurface 22 is-retiaotedWitlnrespeet to'` s'lipsillyfand the l latter fzinaytbe icollapse'dw The .i speartis 1GO then lowered in the tubing by means of the fishing tool string, until it has reached the position at which it is desired to take hold of the tubing. At this position, the string is rotated so as to turn the head 13, a limited rotational movement being permitted by the rotational coupling bringing coupling jaws 2O1 and 20 respectively into engagement with coupling jaws 28a and 281. In this position the abutment jaws 21 and 26 are in non-alinement position, and they may be passed by one another. By elevating the fishing tool string the tapered surface 22 is brought to bear upon the slips and projects the latter to expanded position as shown in Fig. 3. During the manipulation of the tool, the springs 27 serve to hold the cage against rotation. To collapse the tool, the string is lowered and turned in the reverse direction. lt is obvious that manipulation of the tool to collapsin and noncollapsing position or vice versal may be performed in the well hole.

Vilhat we claim is 1. A spear comprising a cage, an expander mandrel slidably mounted in said cage and extending axially thereof, slips projectable from said cage and operable by longitudinal movement of said mandrel in relation thereto to cause expansion and collapsion of said slips, coacting abutment jaws on said mandrel and cage shiftable into position out of lateral apposition and turnable in relation to one another into longitudinal alinement to engage and sustain said cage and mandrel in collapsing position or Vturnable into unalinement to permit longitudinal relative shifting of said mandrel and cage to work engagingposition with said jaws in apposition, and rotational coupling means connecting said cage and mandrel permitting and limiting relative rotation of the abutment jaws between jaw alinement and non-alinement positions.

2. A spear comprising a shell with slots in the peripheral wall thereof, slips accommodated in said slots for projection and retraction, spaced inwardly projecting abutment jaws on said shell, a mandrel rotatablj7 and longitudinally shiftable in saidVS/hell, said mand rel having a tapering surface bearing against said slips, abutment jaws on said mandrel corresponding to the abutment jaws on said shell to provide coacting abutment surfaces turnable in relation to one another into longitudinal alinement to engage and sustain said shell and mandrel in collapsing position or into unalinement to permit longitudinal movement for location of said mandrel and shell in work engaging position, a head on said mandrel with longitudinally ex tending coupling jaws, cooperating coupling jaws extending from said shell and meshing with-the coupling jaws on said head, the coacting coupling aws being spaced to provide for limitedrotational movement of said cage and mandrel, said coupling jaws being so positioned with respect to said abutment jaws so that in lateral bearing position of opposing surfaces of said coupling jaws, said abutment jaws will be in longitudinal alinement and in the bearing position of the opposite surfaces of said coupling jaws said abutment jaws will be out of alinement.

3. A spear comprising a shell with slots in the peripheral wall thereof, slips accommodated in said slots for projection and retraction, spaced inwardly projecting abutment jaws on said shell, a mandrel rotatably and longitudinally shiftable in said shell, said mandrel having a tapering surface bearing against said slips, cooperating abutment jaws on said mandrel corresponding to the aws on said shell to provide coacting abutment surfaces turnable in relation to one another into longitudinal alinement to engage and sustain said shell and mandrel in collapsing position or into unalinement to permit longitudinal movement for location of said mandrel and shell in work engaging position, a head on said mandrel with longitudinally extending coupling jaws, coupling jaws eX- tending from said shell and meshing with the coupling aws on said head, the coacting coupling jaws being spaced to provide for limited rotation of movement of said cage and mandrel said coupling jaws being so positioned with respect to said abutment jaws that in lateral bearing position of opposing surfaces of said coupling jaws, said abutment jaws will be in longitudinal alinement and in the bearing position of the opposite surfaces of said coupling jaws, said abutment jaws will be out of alinement, and means on said shell to frictionally engage the work and resist rotation.

In witness that we claim the foregoing we have hereunto subscribed our names this 23rd day of May, 1928.

ALPHAEUS C. BAIMBRIDGE. ERVIN BURNS. JESSE M. ALEXANDER. 

